package com.nowcoder.community.controller;/**
 * @description:
 * @Author HP
 * @create 2021/12/29 16:33
 */

import com.nowcoder.community.entity.Event;
import com.nowcoder.community.entity.User;
import com.nowcoder.community.event.EventProducer;
import com.nowcoder.community.service.LikeService;
import com.nowcoder.community.util.CommunityConstant;
import com.nowcoder.community.util.CommunityUtil;
import com.nowcoder.community.util.HostHolder;
import com.nowcoder.community.util.RedisKeyUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.HashMap;
import java.util.Map;

/**
 * @author HP
 * @create 2021-12-29 16:33
 * @desc 点赞的实现层
 **/
@Controller
public class LikeController implements CommunityConstant {
    @Autowired
    private LikeService likeService;

    @Autowired
    private HostHolder hostHolder;

    @Autowired
    private EventProducer eventProducer;

    @Autowired
    private RedisTemplate redisTemplate;

    @RequestMapping(path = "/like",method = RequestMethod.POST)
    @ResponseBody
    public String like(int entityType, int entityId,int entityUserId,int postId){
        User user= hostHolder.getUser();

        // 点赞
        likeService.like(user.getId(),entityType,entityId,entityUserId);

        // 数量
        long likeCount = likeService.findEntityLikeCount(entityType, entityId);
        // 状态
        int likeStatus = likeService.findEntityLikeStatus(user.getId(), entityType, entityId);
        // 返回的结果
        Map<String,Object> map=new HashMap<>();
        map.put("likeCount",likeCount);
        map.put("likeStatus",likeStatus);

        // 触发点赞事件
        if (likeStatus == 1) {
            Event event = new Event()
                    .setTopic(TOPIC_LIKE)
                    .setUserId(hostHolder.getUser().getId())
                    .setEntityType(entityType)
                    .setEntityId(entityId)
                    .setEntityUserId(entityUserId)
                    .setData("postId", postId);
            eventProducer.fireEvent(event);

        }
        if (entityType==ENTITY_TYPE_POST){
            //计算帖子分数（发帖时给一个基础分）,若存到队列里会导致重复计算，而存到set比较好
            String redisKey = RedisKeyUtil.getPostScoreKey();
            redisTemplate.opsForSet().add(redisKey,postId);
        }

        return CommunityUtil.getJSONString(0,null,map);
    }
}
